Polytune 3 App

The one thing, that i'm missing, is the ability to fine tune my guitar almost on the go. Yeah, on my iPhone I have a GarageBand, but the path I need to go to access the tuner is like trying to jump on moon. In the end I'm struggling with slightly incorrect tune recognition. But I have nothing to rely on. I looked on my floor and found that piece of art, waiting for me to help, like it did before. That would be a nice app. UPD: I just checked an AppStore. It seems that the creators made an app, with different design. Am I the only one who's willing to get the actual design of metal box into a phone?